/******************************************************************************
 * Copyright 2022 The Airos Authors. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *****************************************************************************/

#pragma once

#include <cmath>

namespace airos {
namespace perception {
namespace algorithm {

template <typename Dtype>
inline Dtype sigmoid(Dtype x) {
  return 1.0 / (1.0 + exp(-x));
}
template <typename Dtype>
inline Dtype gaussian(Dtype x, Dtype mu, Dtype sigma) {
  return std::exp(-(x - mu) * (x - mu) / (2 * sigma * sigma));
}
template <typename Dtype>
Dtype sqr(Dtype x) {
  return x * x;
}

}  // namespace algorithm
}  // namespace perception
}  // namespace airos
